CN213598374U - Anti-loosening bolt - Google Patents
Anti-loosening bolt Download PDFInfo
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- CN213598374U CN213598374U CN202022507237.2U CN202022507237U CN213598374U CN 213598374 U CN213598374 U CN 213598374U CN 202022507237 U CN202022507237 U CN 202022507237U CN 213598374 U CN213598374 U CN 213598374U
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- bolt
- shaped pin
- locknut
- hoop
- loosening body
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Abstract
The invention discloses a check bolt which comprises a compression nut, a bolt, a check nut/check body, a hoop and a U-shaped pin. Because the two sections of threads on the compression nut have different screw directions and/or screw pitches, the problem of loosening of the threaded connection between the compression nut and the bolt is effectively solved, and the potential safety hazard in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of mechanical parts, and particularly relates to a check bolt.
Background
At present, the anti-loosening method of threaded connection mainly adopts the forms of double nuts or elastic cushion structures and the like, and achieves the anti-loosening and retaining results by increasing the friction torque.
The anti-loosening methods for increasing the friction torque improve the anti-loosening performance of the structure to a certain extent, but under the condition of larger vibration of a system and the like, the nut still has larger possibility of loosening, once the loosening occurs, the effectiveness of the whole connection is greatly influenced, even the failure of the whole connection is possibly caused, and a serious safety result is generated.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a check bolt, which solves the problem that a nut is loosened in threaded connection.
The technical scheme is as follows:
in order to solve the above problems, the present invention provides the following technical solutions:
the utility model provides a check bolt, includes gland nut, bolt, check nut, clamp and U-shaped round pin, be provided with the screw thread of mutually supporting on bolt and the gland nut, its characterized in that:
the threaded end of the bolt is provided with a clamp groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side;
the internal thread of the compression nut is matched with the external thread on the bolt, and one side of the compression nut is provided with the external thread;
one end of the locknut is an internal thread, the internal thread is matched with the external thread of the compression nut, the other end of the locknut is a step hole, one side of the step hole of the locknut is provided with two side through holes which are parallel to each other, the center lines of the two side holes are parallel to the end surface of the locknut and are symmetrically distributed along the axis of the locknut, and the two side holes are used for inserting U-shaped pins;
the outer diameter of the hoop is larger than the diameter of a through hole of a step hole of the locknut, and the hoop is matched with a hoop groove on the bolt so as to limit one side of the locknut from axially moving;
the width of the cross section of the U-shaped pin is smaller than that of a U-shaped pin insertion groove on the bolt, and the U-shaped pin is matched with the side hole in the locknut. The U-shaped pin is made of a material with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part, so that the U-shaped pin cannot fall off after penetrating through the side hole of the locknut and the U-shaped pin groove on the bolt.
Preferably, the internal thread of the compression nut is opposite in direction and/or different in pitch from the external thread. When the compression nut is connected with the bolt and the locknut at the same time, the mechanism can effectively prevent the compression nut from loosening under the condition of limiting the axial movement of the locknut.
Preferably, after the hoop and the U-shaped pin are installed on the bolt, the distance between the hoop and the inner side of the U-shaped pin is slightly smaller than the depth of the step at the step hole of the locknut. After the hoop is installed in place, the U-shaped pin penetrates through the two side holes in the locknut and the U-shaped pin insertion groove in the bolt and penetrates out of the other side of the locknut to form interference fit, the locknut is guaranteed to be capable of rotating only and not capable of moving axially along the bolt, and loosening of the compression nut is prevented by limiting axial movement of the locknut.
As an advantageous application, the bolts may be single-headed bolts or stud bolts.
The technical scheme includes that firstly, the locknut and the compression nut are screwed together to form a combined nut, the bolt penetrates through a hole of a connected piece, then the end of the compression nut in the combined nut is screwed onto the bolt towards the connected piece, the compression nut is screwed by standard specified torque, and the connected piece is compressed; then, mounting a hoop in a bolt hoop clamping groove, screwing a locknut, screwing the step hole end of the locknut to the hoop and screwing the locknut to a specified torque; and finally, the U-shaped pin penetrates through the side hole in the locknut and the U-shaped pin insertion groove in the bolt to prevent the locknut from axially moving, so that the integral anti-loosening effect is formed.
As a variation of the above scheme, the anti-loose connection similar to the anti-loose connection obtained by changing the anti-loose nut with the internal thread into the anti-loose body with the external thread comprises a compression nut, a bolt, an anti-loose body, a clamp and a U-shaped pin, wherein the bolt and the compression nut are provided with the threads matched with each other, and the anti-loose connection is characterized in that:
the threaded end of the bolt is provided with a clamp groove positioned at the outer side and a U-shaped pin insertion groove positioned at the inner side;
the inner hole of the compression nut of the variant is provided with two sections of internal threads, wherein the internal threads with smaller diameter are matched with the external threads on the bolt;
one side of the anti-loosening body is provided with an external thread, the external thread is matched with an internal thread with a larger diameter of the compression nut, the other side of the anti-loosening body is provided with two side through holes which are parallel to each other, the center lines of the two side holes are parallel to the end surface of the anti-loosening nut and are symmetrically distributed along the axis of the anti-loosening body, and the diameter of an inner hole of the anti-loosening body is larger than the major diameter of the thread of the bolt;
the outer diameter of the hoop of the variant is larger than the diameter of the through hole of the step hole of the locknut, and the hoop is matched with a hoop groove on the bolt so as to limit one side of the locknut from axially moving;
the cross section width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the bolt, and the U-shaped pin is matched with the side hole on the locknut. The U-shaped pin is made of a material with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part, so that the U-shaped pin cannot fall off after penetrating through the side hole of the locknut and the U-shaped pin insertion groove on the bolt.
As a variant, the two sections of the internal thread on the compression nut are preferably of opposite hand and/or of different pitch. When the compression nut is connected with the bolt and the anti-loosening body at the same time, the mechanism can effectively prevent the compression nut from loosening under the condition of limiting the axial movement of the anti-loosening body.
As a preferred modification, after the clip and the U-shaped pin are mounted on the bolt, the maximum distance between the clip and the inner side of the U-shaped pin is slightly smaller than the minimum distance between the end surface of the non-threaded end of the anti-loose body and the side surface of the U-shaped pin on the same side after the U-shaped pin is inserted into the anti-loose body. After the hoop is installed in place, the U-shaped pin penetrates through the two side holes in the anti-loosening body and the U-shaped pin insertion groove in the bolt and penetrates out of the other side of the anti-loosening body to form interference fit, the anti-loosening body is guaranteed to only rotate and cannot axially shift along the bolt, and the compression nut is prevented from being loosened by limiting the axial shift of the anti-loosening body.
As a variant, an advantageous application is that the bolt can be a stud or a stud.
The scheme of the variant is that the anti-loose body and the compression nut are screwed together to form the combined nut, the bolt penetrates through the hole of the connected piece, the end of the compression nut in the combined nut is screwed on the bolt towards the connected piece, the compression nut is screwed by standard specified torque, and the connected piece is compressed; then, a hoop is arranged in a bolt hoop groove, the anti-loosening body is screwed, the non-threaded end of the anti-loosening body is screwed to the hoop and is screwed to a specified torque; and finally, the U-shaped pin penetrates through the side hole on the anti-loosening body and the U-shaped pin insertion groove on the bolt to prevent the axial movement of the anti-loosening body, so that the integral anti-loosening effect is formed.
(III) advantageous effects
The invention has the beneficial effects that: by adopting the locknut or the lockbody, the compression nut is connected by two threads with different turning directions and/or different screw pitches, thereby preventing the connection between the compression nut and the bolt from loosening and eliminating the potential safety hazard caused by loosening. The mechanism is convenient to disassemble and assemble, simple to manufacture and easy to standardize.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a variation of the embodiment of the present invention
FIG. 3 schematic of a bolt embodying aspects of the present invention
FIG. 4 is a schematic view of the installation of the composite nut according to the present invention
FIG. 5 is a schematic view of a U-shaped pin according to an embodiment of the present invention
The reference numerals are explained below:
1 pressing nut, 2 bolts, 2-1 clamp groove, 2-2U-shaped pin insertion groove, 3 locknut/lockbody, 4U-shaped pin, 5 clamps and 6-1/6-2 connected piece
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to the following embodiments.
Referring to fig. 1, a schematic diagram of an embodiment of the present invention is shown, wherein a first step is to screw a compression nut 1 and a locknut 3 together to form a combined nut; the second step is that the bolt 2 passes through the holes of the connected pieces 6-1 and 6-2, the end of the compression nut 1 in the combined nut is screwed on the bolt 2 towards the connected pieces, the compression nut 1 is screwed to a specified torque, and the connected pieces are compressed; thirdly, installing a clamp 5 in a clamp groove 2-1 of the bolt 2; fourthly, the locknut 3 is screwed until the side surface of the locknut contacts with the hoop 5 and is screwed to a specified moment; fifthly, the U-shaped pin 4 penetrates through the side hole of the locknut 3 and the 2-2U-shaped pin insertion groove on the bolt 2; so far, the whole installation is completed.
Fig. 2 is a schematic diagram of a variation of the embodiment of the present invention, which is substantially similar to fig. 1 and will not be further described herein.
The specific working principle is as follows: the two sections of threads on the compression nut 1 have different turning directions and/or thread pitches, so that when the whole connection causes the compression nut 1 to have a loosening trend due to the influence of internal and external factors, the threaded connection on the locknut/lockbody 3 can effectively prevent the loosening from occurring due to the different turning directions and/or thread pitches.
The above is only the preferred embodiment of the present invention and a variation thereof, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various improvements and modifications can be made without departing from the spirit and scope of the invention, and these improvements and modifications should also be construed as within the scope of the invention.
Claims (8)
1. The utility model provides a check bolt, includes gland nut, bolt, check nut, clamp and U-shaped round pin, be provided with the screw thread of mutually supporting on bolt and the gland nut, its characterized in that:
the threaded end of the bolt is provided with a clamp groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side;
the internal thread of the compression nut is matched with the external thread on the bolt, and one side of the compression nut is provided with the external thread;
one end of the locknut is an internal thread which is matched with the external thread of the compression nut, the other end of the locknut is a step hole, one side of the step hole of the locknut is provided with two side through holes which are parallel to each other, and the center lines of the two side holes are parallel to the end surface of the locknut and symmetrically distributed along the axis of the locknut;
the outer diameter of the clamp is larger than the diameter of the through hole of the step hole of the locknut, and the clamp is matched with the clamp groove on the bolt;
the cross-sectional width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the bolt, the U-shaped pin is matched with the side hole on the locknut, the U-shaped pin is made of materials with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part.
2. A check bolt as defined in claim 1, wherein: the internal thread on the compression nut is opposite in rotation direction and/or different in thread pitch from the external thread.
3. A check bolt as defined in claim 1, wherein: after the hoop and the U-shaped pin are installed on the bolt, the maximum distance between the hoop and the inner side of the U-shaped pin is slightly smaller than the step thickness of the step hole of the locknut, and when the U-shaped pin penetrates through two side holes in the locknut and a U-shaped pin insertion groove in the bolt and penetrates out from the other side of the locknut, interference fit is formed among the hoop, the U-shaped pin and the locknut along the axial direction of the bolt, so that the locknut is ensured to rotate only and cannot move along the axial direction of the bolt.
4. A check bolt as defined in claim 1, wherein: the bolt can be a single-head bolt or a double-head bolt.
5. The utility model provides a check bolt, includes gland nut, bolt, locking body, clamp and U-shaped round pin, be provided with the screw thread of mutually supporting on bolt and the gland nut, its characterized in that:
the threaded end of the bolt is provided with a clamp groove positioned on the outer side and a U-shaped pin insertion groove positioned on the inner side;
the inner hole of the compression nut is provided with two sections of internal threads, wherein the internal threads with smaller diameters are matched with the external threads on the bolt;
the anti-loosening body is characterized in that an external thread is arranged on one side of the anti-loosening body, the external thread is matched with an internal thread with a larger diameter of the compression nut, two side through holes which are parallel to each other are arranged on the other side of the anti-loosening body, the center lines of the two side holes are parallel to the end face of the anti-loosening body and are symmetrically distributed along the axis of the anti-loosening body, and the diameter of the inner through hole of the anti-loosening body is larger;
the outer diameter of the hoop is larger than the diameter of the through hole in the anti-loosening body, and the hoop is matched with the hoop groove on the bolt;
the cross-sectional width of the U-shaped pin is smaller than the width of a U-shaped pin insertion groove on the bolt, the U-shaped pin is matched with the side hole on the locknut, the U-shaped pin is made of materials with certain elasticity and hardness, and the opening size of the opening end is larger than that of the middle part.
6. A check bolt according to claim 5, wherein: the two sections of internal threads of the compression nut are opposite in screwing direction and/or different in thread pitch.
7. A check bolt according to claim 5, wherein: after the hoop and the U-shaped pin are installed on the bolt, the maximum distance between the inner sides of the hoop and the U-shaped pin is slightly smaller than the minimum distance from the end face of the non-threaded end of the anti-loosening body to the side face of the same side of the U-shaped pin after the U-shaped pin is inserted into the anti-loosening body, when the U-shaped pin penetrates through two side holes in the anti-loosening body and the U-shaped pin insertion groove in the bolt and penetrates out from the other side of the anti-loosening body, interference fit is formed among the hoop, the U-shaped pin and the anti-loosening body along the axial direction of the bolt, and the anti-loosening body.
8. A check bolt according to claim 5, wherein: the bolt can be a single-head bolt or a double-head bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022507237.2U CN213598374U (en) | 2020-11-03 | 2020-11-03 | Anti-loosening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022507237.2U CN213598374U (en) | 2020-11-03 | 2020-11-03 | Anti-loosening bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213598374U true CN213598374U (en) | 2021-07-02 |
Family
ID=76593891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022507237.2U Active CN213598374U (en) | 2020-11-03 | 2020-11-03 | Anti-loosening bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213598374U (en) |
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2020
- 2020-11-03 CN CN202022507237.2U patent/CN213598374U/en active Active
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